1. Write to a text (ASCII) file
2. Read a text (ASCII) file to a 1-D array and write a text file
4. Read a SAC file and some header values (e.g., event locations)
5. Executing Linux system commands inside Fortran
6. Write and execute a SAC program in fortran
7. An example of the use of subroutines
9. The use of the function amin1
10. Get the average of an array
11. Converting earthquake time into decimal year
13. Number of quakes per day using arrays to speed up the processing
14. Real-life research: Spatial distribution of seismic b_values
15. Counting quakes in a circle using the subroutine distazsub.f